Patent GB-311408-A (GB)
Title: Improvements in the cutting of sheet glass and the like
IPC: C03B21/02
Filed: 1929-05-09
Abstract: 311,408. Naamlooze Vennootschap Maatschappij tot Beheer en Exploitatie van Octrooien, (Assignees of Goodwillie, D. H., and Walters, E. L.). May 12, 1928, [Convention date]. Cutting or dividing ; rolling.- Relates to apparatus for cutting plate or sheet glass while it is still hot and plastic and while it is lying on the tables on which it is received from the rolling- machine. The glass strip is received on a number of tables set end to end and separated by small gaps, or on a single table provided with transverse recesses or gaps, and the strip is cut into sections by a blade or cutting- device which is driven down through the glass into the gaps. According to the invention, a cutting-device is used which exerts pressure on the glass where it is disposed across a gap and then severs the glass along the edges of the gap to remove the waste strip thus defined. The receiving-tables 3, Fig. 2, which carry the glass strips 2 are supported by wheels 4 that run on rails 5. An horizontal I-beam 9 straddles the path of the tables and is supported by a frame 26 having wheels 29 which run on rails 30 parallel with the rails 5. Each frame 26 has a downwardly-extending bracket 35 on which an arm 36 is pivoted, and the arms are normally held by gravity in an horizontal position where they lie in the path of abutments 39 carried by the tables. As each abutment 39 engages an arm 36, the beam moves forward with the table until the arm 36 is raised by a cam track 41. A cable attached to the frame 26 passes over sheaves 44 and is secured to a counterweight. When the frame 26 is moved by the tables, the counterweight is raised and it restores the frame to its initial position as soon as the arms 36 are raised by the cam tracks. The cutting-device is mounted beneath a carriage 6 having wheels 7 which ride on the lower flanges of the beam 9. A motor 10 moves the carriage along the beam 9 through the medium of a spur wheel 17, Fig. 5, which engages a rack 18 secured to the upper flanges of the beam. The motor also drives the cutter which consists of two similar serrated or scalloped cutting-discs 24 keyed on a shaft 22 on each side of a circular cutting-disc 25 of greater diameter. The discs 24 make shearing engagement with plates 76 secured to the edges of the tables 3. Coil springs 79, carried by the central discs 25, keep the discs 24 in close engagement with the plates 76. In operation, the abutments 39 of a table 3 engage the arms 36 and cause the cutter frame 26 to move forward with the table. A cam 48. carried by the table moves a switch and causes the motor 10 to traverse the cutter carriage 6 along the beam 9. The central disc 25 first engages the glass above the gap between successive tables and stretches it tightly across the upper edges of the plates 76, at the same time partly or completely severing it. The projections or lobes of the discs 24 then engage the edges of the plate 76 and shear through the glass. The strip of glass thus removed drops into a pan 78. When the cut is completed, the carriage 26 is released and restored to its initial position.